121210118016643 has 2 divisors, whose sum is σ = 121210118016644. Its totient is φ = 121210118016642.

The previous prime is 121210118016623. The next prime is 121210118016697. The reversal of 121210118016643 is 346610811012121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121210118016643 - 2⁹ = 121210118016131 is a prime.

It is not a weakly prime, because it can be changed into another prime (121210118016623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605059008321 + 60605059008322.

It is an arithmetic number, because the mean of its divisors is an integer number (60605059008322).

Almost surely, 2^{121210118016643} is an apocalyptic number.

121210118016643 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210118016643 is an equidigital number, since it uses as much as digits as its factorization.

121210118016643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 37.

Adding to 121210118016643 its reverse (346610811012121), we get a palindrome (467820929028764).

The spelling of 121210118016643 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred eighteen million, sixteen thousand, six hundred forty-three".